updates

README.md

@@ -7,6 +7,9 @@ This is the official repository of BPF (eBPF) tools from the book [BPF Performan
 
 These tools are documented in the book.
 
+#### Tools:
+<center><a href="images/bpf_performance_tools_2019.png"><img src="images/bpf_performance_tools_2019.png" border=0 width=700></a></center>
+
 ## Updated tools
 
 You may contribute updated versions of the tools to the updated/ directory as you find they need fixes for newer kernels or other distributions (which can change CONFIG options or library paths, changing the probes). Please avoid ifdef's where possible, and create separate tools as they can be tested and maintained independently. Filename examples:

originals/Ch13_Applications/signals.bt

@@ -25,7 +25,6 @@ BEGIN
 	@sig[4] = "SIGILL";
 	@sig[5] = "SIGTRAP";
 	@sig[6] = "SIGABRT";
-	@sig[6] = "SIGIOT";
 	@sig[7] = "SIGBUS";
 	@sig[8] = "SIGFPE";
 	@sig[9] = "SIGKILL";
@@ -48,6 +47,7 @@ BEGIN
 	@sig[26] = "SIGVTALRM";
 	@sig[27] = "SIGPROF";
 	@sig[28] = "SIGWINCH";
+	@sig[29] = "SIGIO";
 	@sig[30] = "SIGPWR";
 	@sig[31] = "SIGSYS";
 }